Bolt



P. BAUER AND 8.1. FITZSIMMONS.

BOLT.

APPLICATION FILED APII. 20, 1920.

Peeentea Feb. 8,1921.

UNITED STATES PATENT OFFICE.

`IEAUIL BAUER AND BERNARD J. FITZSIMMONS, 0F B ILL'LIIMIORE, MARYLAND.

BOLT.

Application filed April 20,

To afl whom t may concer/n.:

Be it known that we, PAUL BAUER and BERNARD J. FrrzsrMMoNs, citizens' of the United States, residing at Baltimore, in the State of Maryland, have invented certain new and useful Improvementsin Bolts, of' which the following is a specification.

This invention relates to fastening elements and the primary object of the invention is to provide an improved bolt, which is especially adapted for use in holding ship plates in position, while the same are being` riveted in place, but which is susceptible for other uses. f

In ship building, an ordinary nut and bolt is used for temporarily holding plates or the like in position while the same are being riveted in place, which requires the services of two men,one on the outside for sticking the bolts through the lapertures and one on the inside for threading the nuts on the bolts. 'The riveters follow the nut and bolt men andwhen several rivets have been placed in position, the nuts are removedand the' rivet'er pushes the bolts through the holes and Ipermits the same to drop promiscuously on the ground and be lost. Thus vin the method it can be seen that, one, the

services of two men is required lfor positionf ing the bolts in place, and as one is on `one side and one on the other side they often become separated which causes loss of time and confusion; that two,the bolts are lost 'after being used once, and that three, serious .which can be readily placed through an opening and which are constructed in.such a manner that when the same are drawn together and moved into operative position in the opening the movement .thereof .through the opening is prevented.

A further object of the invention is t0` provide an improved t wo part bolt, which is adapted to be used 1n places where itis Specification of Letters Patent.

Patented Feb. 8. 1921. 1920. lserial No. 37am...

impossible to inserta bolt from one side and place the nut on from the opposite side and which'is so constructed that the parts of the bolt are forced into tighter'operative position as the nut is tightened. n

A further object of the .invention is "to provide an improved two part bolt, which is prevented from slipping aroundin the open-' ing, asthe nut is advanced, thereby obviating the necessity of holding the head vof the bolt with wrenches and the like.

-A still further object of the invention is to provide an improved bolt of the above character which is durable and elicient in useone that is simple and easy to manufacture, and one which can be placed upon the market at a reasonable cost.

With these and other objects in view, the` invention consists of the novel construction, arrangement and formation of parts as wlll be hereinafter more fully described, claimed and illustrated in the accompanying drawings, forming a part of this specification and in which drawings: a

Figure l is an elevation of the improved bolt showing the same in operative engagement with the work, the work and nut being shown in section.

. t Fig.' 2 is afragmentary side elevation ofl one of the bolt sections being placed in position in the work, the work being shown in section.l

Fig. 3 is a similar view showing both of the sectionsibeing placed in position inthe work prior to the same being moved lnto operative position.

Fig. 4; is a cross section through one of the bolt sections being.placed in position.

Fig. 5 is a crossv section through the `bolt section showing the same being moved into operative position. n

Fig. 6 is a similar view showing the sections in operative position.

.. A'Fig. 7 is a perspectiveZ view of the bolt sections. 1

8 is a fragmentary cross section throu h the lskin of a vessel `showing the bolts olding the plates temporarily in position.

Fig. 9 is a fragmentary longitudinal 'section through the bolt. v Fig. 10 is an end eleyation of the bolt. Referring to the drawings, in detail, wherein similar referencg characters designate corresponding partsthroughout the several views, the letter A indicates the imj L vided with a cross slot 20, for the reception proved bolt, B the nut, and C the work engaged by the nut and bolt, which as shown is a pair of plates l0.

The improved bolt A includes the companion sections 11 and 12', each of which are substantially semi-circular in cross section and provided with threads 13. lThe section -11 is provided with a head 14, which pro-v jects laterally from one side thereof, as clearly shown in the drawings. T he section 12 is also provided with a head 15, which projects laterally therefrom in a direction opposite to the head 14. The section 11 directly below the head 14 is provided upon its outer portion or side with a shifting and holding enlargement 16, which is gradually tapered or beveled toward the shank of the section 11 as at 17, for a-purposewhich will hereinafter more fully appear. The ends of the enlargement 16 defines sharp cutting teeth or biting edges 18, which are adapted to engage'the inner surface of apertures formed in the work at opposite sides thereof to prevent rotation of the bolt therein. rlhe teeth or biting edges 18 are also gradually inc/lined onl oppositesides as at 19.

In operation of the improved bolt A, the section 11 is inserted -head rst through the aperture in the work C and the enlargement 16 thereof is held Jbeyond the aperture after which the section 12 'l inserted' head first through the apertures. The sections are then brought together and drawn inwardly, which moves the inclined face 17 of the enlargement in engagement with the wall of the apertures and forces the heads 1'4 and 15 in' position. As the heads 14 and 15 are drawn into position the teeth or biting edges 18, owing to-the inclined face thereof', will be drawn into tight engagement with the opposite portions of the walls of the aperture and thus positively prevent accidental rotation ofthe bolt. The nut C which is of the-usual construction is thenL threaded in placein the ordinary manner. J

The section 11 has its outer surface lying between the threads and the. beveled portions 17 reduced and cut inwardly of the threaded portion thereof, so as to permit the section 1l to be mpved farther over inthe apertures, to permit of the ready placing of the other section in place.

In Figs. 9 and 10'is illustrated a slightly modified form of the bolt A in which l.the ends thereof opposite to the heads is pro.-l

of the bit of a screw driver, which may be used fon holding the bolt against rotation,v

while the nut lis being threaded in position. In Fig. 8 is illustrated the bolts A hold I ing plates 21and 22 in position, while the same are being riveted in place.

From the foregoing-description 1t can be seen that an improved bolt. isprovided which can be readily inserted or withdrawn from the same side on which the Anut is placed on or removed.

Changes in details may be made without departing from the spirit or scope of the claims, but;

We claim:

1. A bolt comprising longitudinal sections,

2. A bolt comprising longitudinal sections,

each section embodying a shank provided with a head extending `lateraly beyond the same and also having screw-threads, and a' shifting enlargement formed upon the outer4 portion of one section forwardly of the head, said enlargement projecting laterally beyond the shank for a substantial distance and terminating inwardly of the edge of the head1,` said shifting enlargement embody# ing an inclined face, and being -adapted to move the shanklaterally and inwardly and Vto positively hold the same inthe inner position.

3. A bolt comprising longitudinal sections, each section `embodying a shank provided with a head extending laterally beyond the same rand lalso having screw-threads, one

` shank being provided upon its outer portion forwardly of its head with a recess formed therein, and a shifting enlargement arranged betweenn the recess and head and secured to said shank, said enlargement extending laterally beyond the shank and embodying an inclined; face.

4. Abolt comprising longitudinal'sections,

formed on t e shank of one section arranged.'4

to engage in the bore of the work which the embodying wShanks having straight inner bolt is associated Qwithfand biting teeth formedgonthe shank at opposite spaced poings arranged-to `engage the bore of the wor 6. A bolt comprisinglongitudinal sections,

each section embodying a shank provided with a head extending laterally beyond the same and also having screw-threads, one

shank being provided upon its outer pob shank in an inner position spaced from the tion forwardly of the head and near the Wall of the opening of the bolt when the samev with a holding enlargement. said enbolt is drawn forwardly so that the head of largement projecting laterally beyond the the same is in the inner position.

5 shank for u substantial distance, said en- PAUL BAUER.

largement serving to positively lholol its BERNARD J. F ITZSIMMONS. 

